Permeation of oxygen/nitrogen in cobalt-chelated copoly(EDTA-MMA-BA) membranes

Cheng Chien Wang, Chuh Yean Chen, Chao Cheng Huang, Chuh Yung Chen, Jen Feng Kuo

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6 Citations (Scopus)


EDTA-MMA-BA copolymer was prepared by radical polymerization in aqueous solution. EDTA, which chelated cobalt ions (Co2+), at the chain end of copolymer was as an oxyphilic carrier. Different cobalt ions contents of chelated copolymer membranes were prepared and shown good oxygen permeability (P(O(2))=10x10-9cc(STP)cm/cm2scmHg (100 barrer)) and highly permselectivity (α(O2/N2)=10) of oxygen/nitrogen. The separation factor increased with the increasing of Co2+ contents in copolymer membranes. Both the permeation behaviors and the change of pressure were in good agreement with Petropoulos [J.H. Petropoulos, J. Polym. Sci. A2 8 (1970) 1797], Paul and Koros' [D.R. Paul, W.J. Koros, J. Polym. Sci.: Polym. Phys. Ed. 14 (1976) 675] modified dual-mode absorption theory. The relationship between the oxygen or nitrogen permeability and temperature follows the Arrhenius relation. The apparent diffusion activation energies of oxygen and nitrogen were estimated to be 7.4-11.4 and 12kcal/mol, respectively. Copyright (C) 2000 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)189-199
Number of pages11
JournalJournal of Membrane Science
Issue number1-2
Publication statusPublished - 2000 Aug 30

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation


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